anal

(not comparable) of, related to, intended for or involving the anus. [from 18th c.]

(psychoanalysis) Of the stage in psychosexual development when the child's interest is alleged to be concentrated on the anal region. [from 20th c.]

(psychology) Of a person, compulsive and stubborn, obsessed with neatness and accuracy, supposedly from not having progressed beyond the anal stage. [from 20th c.]

(entomology, of a vein) Proximate to the thorax.